SDR 2022FA0000727

Service difficulty report · Exhaust Valve · Cessna 150L

Difficulty date: November 23, 2022
Submitted: November 23, 2022
Operation: General aviation
Aircraft: N66062
Make and model: Cessna 150L
Aircraft serial: 15075807
Engine: Cont O200A
Engine time: 1,009 hours
System (JASC): 8530 · Reciprocating Engine Cylinder Section
Part: Exhaust Valve
Condition: Stuck
Location: Nr 4 Cylinder
Stage of operation: TX
How discovered: O
Nature of condition: R
Precautionary procedure: D

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

ENGINE ROUGH RUNNING DURING PRE-TAKE OFF RUN UP. COMPRESSION TEST FINDS NONE IN #4 CYLINDER. DISASSEMBLED, FOUND EXHAUST VALVE STUCK DUE CARBON BUILD UP IN VALVE GUIDE. CLEANED VALVE AND GUIDE, RE-ASSEMBLED, RE-INSTALLED, OPERATION SATIFACTORY

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